RABL testing example

cards_controller.rb

class CardsController < ApplicationController
  respond_to :json

  def index
    @cards = Card.all
  end

end

cards_controller_spec.rb

require 'spec_helper'

describe CardsController do
  render_views

  describe 'GET #index' do

    it 'populates an array of cards' do
      card = create(:card)
      get :index, format: :json

      expect(response).to be_success
      expect(JSON.parse(response.body).first["card"]["name"]).to eq "angry chicken"
    end

  end

end

index.json.rabl

collection @cards
cache @cards
attributes :name, :image_id, :image_url, :cost, :hero_id, :rarity, :type